<template>
  <div>
    <nav-bar>
      <div slot="left" class="back" @click="backClick">
        <img src="~assets/img/common/back.svg" alt=""/>
      </div>
      <div slot="center" class="title">
        <div v-for="(item, index) in titles" :key="index" class="title-item" 
          @click="tabClick(index)" :class="{'active': currentIndex === index}">{{item}}</div>
      </div>
    </nav-bar>
  </div>
</template>

<script>
import NavBar from 'components/common/navbar/NavBar'

export default {
  name: "DetailNavBar",
  components:{
    NavBar
  },
  data(){
    return {
      titles: ['商品', '参数', '评论', '推荐'],
      currentIndex: 0
    }
  },
  methods: {
    tabClick(index){
      this.currentIndex = index
    },
    backClick(){
      this.$router.back()
    }

  }
}
</script>

<style>
  .title {
    display: flex;
  }
  .title-item {
    flex: 1
  }
  .active {
    color: skyblue;
  }
  .back img{
    margin-top: 12px;
  }
</style>